The author writes, “Gerardo Ceballos, a researcher at the Universidad Nacional Autonoma de Mexico in Mexico City, acknowledged that the study is written in usually alarming tones for an academic research paper. ‘It wouldn’t be ethical right now not to speak in this strong language to call attention to the severity of the problem,’ he said.”
1. What evidence in the article supports the claim that this is a severe problem?

Americium-241 undergoes fission to produce three neutrons per fission event. if a neutron-absorbing material is mixed in with this sample so that the rate of neutron production drops down to 1.8 neutrons per fission event, which will be effective at achieving a critical mass? check all that apply. remove a deflective shield surrounding the sample. remove absorbent material mixed in with the sample. compress the sample of americium-241.